PdI混合源剂量学参数的蒙特卡罗模拟

Monte Carlo Simulation of Dosimetric Parameters for Hybrid PdI Source in Brachytherapy

摘要: 依据美国医用物理学家协会（AAPM）在TG-43U1推荐的剂量学参数计算方法，针对671l型(3M) ¹²⁵I短程治疗源，用蒙特卡罗方法计算剂量率常数，并与相关数据进行了比较。在此基础上，计算研制的新型¹²⁵I-¹⁰³Pd混合源的剂量学参数，如剂量率常数、径向剂量函数和各向异性函数,计算结果对混合源的实验研究和应用具有一定指导意义。

Abstract: According to dose calculation formula recommended by AAPM TG-43U1,dose rate constant of Model 6711 ¹²⁵I brachytherapy source was calculated by Monte Carlo method. The calculation results were in good agreement with TG-43U1. Then, dose rate constant,radial dose function and anisotropy function of new hybrid PdI source were calculated by Monte Carlo method．Empiric equations were obtained for radial dose function．